Do you have to drain the freon?
SOURCE: water pump replacement procedure 2005 2500 dodge with cummins diesel
take off old water pump. clean up area on the motor real good.do this by using a scrapper and cleaning slolvent. when thats all done put hi temp silicon on the block water pump and the put gasket on silicon. let dry for like five minutes. put in on torque bolts to specs.
SOURCE: how to purge air from a cummins 24 valve diesel fuel system
CRACK LOOSE THE INJECTION LINES 2 OR 3 OF THEM WILL BEEN ENOUGH. TURN THE ENGINE OVER TILL FUEL STARTS PUMPING A LITTLE BIT. THEN TIGHTEN THE LINES. IF ENGINE STARTS WEHN BLEDING THE LINES SHUT IT OFF. AFTER LINES ARE TIGHT START YOUR ENGINE THE REST OF THE LINES WILL BLEAD AFTER A SHORT RUN TIME.
SOURCE: water pump needs replacement.cummins diesel
the water pumps on these engines are some of the easiest to replace. just take the belt loose. unbolt the water pump and pull it out. scrape whatever pieces of the old gasket are on the block off. and install new water pump and gasket. the put the belt back on.
here is a better demonstration with pics:
http://www.cumminsforum.com/forum/3rd-gen-tech-articles/182382-water-pump-thermostat-replacement.html
SOURCE: a diagram for changing the
On a cummins turbo diesel the water pump replacement is quite simple i do believe. just have to remove the belt. The clutch fan, and pulley, then the water pump is right there i believe being held on by 4 bolts only and remove. Remember to place the wate pump o-ring on the water pump and hold in place with sort of adhesive just to make sure it doesn't slip out during installation or this will cause a leak. Once everything is installed then you will need to purge the cooling system of the air bubbles by letting it run and watching when the thermostat opens up. You can tell because the level will drop in the rad or over bottle, depending on what controls the fluid. Let it open two or three times, and go for test drive, all should be well...hope this helps
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